I used to think their silence and solemness after winning a race was due to discipline. But after hearing a certain teacher in charge's explaination, I guess there is some spirit in ettique, humility and honor in sportsmanship in singapore after all:

"results speak for themselves. if u haf won, u noe u're gd. there's no need to boast abt it n rub it in for ur other competitors since they alr haf to deal with their own disappointment. besides, u nv noe if u're even competing with the best in the event since every sch has diff strategies. most of all, the person who came in last may haf gone thru much more hardship than urself to jus get to the starting line. so performance shld not be the most impt judging criteria. n the emphasis on humility is cos there will always be someone better than u in this world. as it is, when u do well n is outstanding, there'll alr be ppl trying to get u down. wat more if u go ard showing off??"